333.This section provides protection for purchasers who buy land sold under warrant for sale provided they acted in good faith when buying the land and provided a certificate in the form prescribed in rules of court has been granted by the appointed person confirming the land attachment was properly carried out. The validity of a disposition which is registered by such a purchaser will not be challengeable on the ground that the land attachment was not carried out properly or that it was no longer in force when the sale took place.